Petrology and zircon U-Pb dating of the Neoarchean scapolite-garnet calc-silicate from the Namakkal Block of the Southern Granulite Terrain, India, and their geological implications
文献类型：期刊论文
| 作者 | Zhou Feng2; Gou LongLong2; Zhai MingGuo1,2; Zhang ChengLi2; George, Paul Mathews2; Lu LunSheng2; Zhao Yan2; Ao WenHao2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2021-04-01 |
| 卷号 | 37期号:4页码:1213-1234 |
| 关键词 | Scapolite-garnet calc-silicate Phase equilibrium modeling Charnockite Metasomatism The Southern Granulite Terrain India |
| ISSN号 | 1000-0569 |
| DOI | 10.18654/1000-0569/2021.04.15 |
| 英文摘要 | Granulite terranes are considered as windows open to the lower crustal processes of the Earth. In this paper, we present detailed petrology, zircon U-Pb dating and phase equilibrium modeling of scapolite-garnet calc-silicate samples from the Tammampatti area of the Namakkal Block, Southern Granulite Terrain, India. On the basis of petrographic observation, two stages of metamorphic mineral assemblages were determined, which are garnet + scapolite + plagioclase + sphene + ilmenite (M1) and epidote corona + the symplectite of calcite, plagioclase and quartz. Cathodoluminescence (CL) imaging reveals that there are two types of metamorphic zircons: zircons with high luminescence and another is characterized by low luminescence. Zircon U-Pb dating using LA-ICP-MS yielded a weighted mean Pb-207/Pb-206 age of 2562 +/- 17Ma for the zircons with high luminescence, whereas those with low luminescence have a weighted mean Pb-207/Pb-206 age of 2495 +/- 15 Ma. The peak metamorphic conditions of two samples 18ID-24 and 18ID-25 are constrained to be 800 similar to 960 degrees C/4.3 similar to 7.1 kbar and 750 similar to 854 degrees C/4.0 similar to 7.8 kbar, respectively. The metamorphic age of 2562 +/- 17Ma is the similar as the crystallization age of the charnockite pluton within the Namakkal Block, which is interpreted to represent the timing of contact metasomatism caused by magma emplacement of the charnockite. The metamorphic age of 2495 +/- 15Ma is considered to be the overprinted time by the previously reported ca. 2530 similar to 2440Ma regional HT-UHT metamorphism. The calc-silicate should be resulted from metasomatism of intermediate-acid pluton (protolith of charnockite) and carbonatite. |
| WOS关键词 | ULTRAHIGH-TEMPERATURE METAMORPHISM ; PRINCE CHARLES MOUNTAINS ; HIGH-PRESSURE GRANULITES ; HIGH-GRADE METAMORPHISM ; WESTERN DHARWAR CRATON ; KERALA KHONDALITE BELT ; FLUID-ROCK INTERACTION ; CRUSTAL EVOLUTION ; EASTERN GHATS ; NILGIRI BLOCK |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000653537300015 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102030]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Gou LongLong |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou Feng,Gou LongLong,Zhai MingGuo,et al. Petrology and zircon U-Pb dating of the Neoarchean scapolite-garnet calc-silicate from the Namakkal Block of the Southern Granulite Terrain, India, and their geological implications[J]. ACTA PETROLOGICA SINICA,2021,37(4):1213-1234. |
| APA | Zhou Feng.,Gou LongLong.,Zhai MingGuo.,Zhang ChengLi.,George, Paul Mathews.,...&Ao WenHao.(2021).Petrology and zircon U-Pb dating of the Neoarchean scapolite-garnet calc-silicate from the Namakkal Block of the Southern Granulite Terrain, India, and their geological implications.ACTA PETROLOGICA SINICA,37(4),1213-1234. |
| MLA | Zhou Feng,et al."Petrology and zircon U-Pb dating of the Neoarchean scapolite-garnet calc-silicate from the Namakkal Block of the Southern Granulite Terrain, India, and their geological implications".ACTA PETROLOGICA SINICA 37.4(2021):1213-1234. |
入库方式： OAI收割
来源：地质与地球物理研究所
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